Rebar cleaning method

A technology for steel bars and anodes, applied in the field of steel bar cleaning, can solve the problems of acid pollution and health damage of operators, and achieve the effects of low cost, convenient operation and less pollution

Inactive Publication Date: 2016-08-24
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problem: The purpose of this invention is to provide a cleaning method for steel bars, which is an environmentally friendly cleaning method for metal materials such as steel bars. The purpose is to improve the pollution of the acid solution to the environment and the damage to the health of operators in the traditional pickling method

Method used

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  • Rebar cleaning method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Washing treatment in a sodium carbonate solution with a mass fraction of 15% for 120 seconds to remove the scale of the corrosion-resistant steel bar.

[0015] 1. Prepare a sodium carbonate solution with a mass fraction of 15%, pour it into the cleaning tank, and the volume of the solution exceeds two-thirds of the cleaning tank;

[0016] 2. Use the stainless steel plate as the anode and the steel workpiece as the cathode, and connect them to the positive and negative poles of the DC power supply (such as figure 1 shown);

[0017] 3. After immersing the anode in the cleaning solution and the cathode workpiece in the electrolyte through the workpiece control system, turn on the power and increase the voltage to 110V. After stable and continuous plasma is generated on the surface of the workpiece, keep it at this voltage for 120 seconds. Disconnect the power;

[0018] 4. Use the workpiece control system to put the workpiece into absolute ethanol for cleaning and drying....

Embodiment 2

[0020] Washing treatment in a sodium carbonate solution with a mass fraction of 10% for 300 seconds to remove the scale of the corrosion-resistant steel bars.

[0021] 1. Prepare a sodium carbonate solution with a mass fraction of 10%, pour it into the cleaning tank, and the volume of the solution exceeds two-thirds of the cleaning tank;

[0022] 2. Use the stainless steel plate as the anode and the steel workpiece as the cathode, and connect them to the positive and negative poles of the DC power supply (such as figure 1 shown);

[0023] 3. After immersing the anode in the cleaning solution and the cathode workpiece in the electrolyte through the workpiece control system, turn on the power and increase the voltage to 110V. After stable and continuous plasma is generated on the surface of the workpiece, keep it at this voltage for 300 seconds. Disconnect the power;

[0024] 4. Use the workpiece control system to put the workpiece into absolute ethanol for cleaning and drying...

Embodiment 3

[0026] Washing treatment in a sodium phosphate solution with a mass fraction of 10% for 120 seconds to remove the scale of the corrosion-resistant steel bar.

[0027] 1. Prepare a sodium phosphate solution with a mass fraction of 10%, pour it into the cleaning tank, and the volume of the solution exceeds two-thirds of the cleaning tank;

[0028] 2. Use the stainless steel plate as the anode and the steel workpiece as the cathode, and connect them to the positive and negative poles of the DC power supply (such as figure 1 shown);

[0029] 3. After immersing the anode in the cleaning solution and the cathode workpiece in the electrolyte through the workpiece control system, turn on the power and increase the voltage to 130V. After stable and continuous plasma is generated on the surface of the workpiece, keep it at this voltage for 120 seconds. Disconnect the power;

[0030] 4. Use the workpiece control system to put the workpiece into absolute ethanol for cleaning and drying....

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Abstract

The invention relates to a rebar cleaning method and belongs to the field of surface cleaning and treatment for metal materials. The method comprises: using a rebar workpiece as a cathode, dipping the cathode and an anode in 5-15% by mass of carbonate or phosphate cleaning liquid, applying direct-current electric field between the two electrodes, and removing oxide scale from the surface of the workpiece. In the environment-friendly cleaning liquid, the oxide scale is removed from the surface of a rebar using electrolytic plasma technique, the process is simple, performing is easy, and the method is low in cost and low in pollution and is an efficient and environment-friendly cleaning method.

Description

technical field [0001] The invention relates to a method for cleaning steel bars, which belongs to the field of cleaning and processing metal material surfaces. Background technique [0002] Corrosion of steel bars is a key issue in the destruction of concrete structures. In recent years, in order to improve the corrosion resistance of ordinary steel bars, alloy steel bars have been developed by adding alloy elements such as Cr to steel bars to increase their resistance to chloride ion corrosion. However, alloy steel bars are in production During the process, a layer of strong and stable oxide scale containing iron oxide and hydroxide will be formed on the surface, resulting in the lack of Cr element on the surface of the steel matrix, reducing its corrosion critical Cl concentration, and the passivation of the corrosion-resistant steel bar. The effect disappears, and its corrosion resistance is greatly reduced. Therefore, the alloy steel bars used in actual engineering nee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25F1/06
CPCC25F1/06
Inventor 张培根杨莉孙正明张亚梅施锦杰田无边
Owner SOUTHEAST UNIV
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